SEAT Workshop Service and Repair Manuals

Checking fuel pump Consult the equivalence table for tools and equipment according to applicability among Seat / VW / Audi / Skoda → Chapter.

Special tools and workshop equipment required

t	Remote control -V.A.G 1348/3 A- with adapter wire -V.A.G 1348/3-3-, see equivalent → Anchor

t	Manual multimeter -V.A.G 1526C-, see equivalent → Anchor

t	Auxiliary measuring tool -V.A.G 1594C-, see equivalent → Anchor

Special tools and workshop equipment required

t  multi-meter -V.A.G 1715-, see equivalent → Anchor Test prerequisites l  Fuses must be OK. l  Battery voltage at least 11.5 V l  All electrical consumers, e.g. lights and rear window heating, must be switched off. Checking function and voltage supply –  Remove rear right seat → Bodywork - Interior fitting work; Rep. gr.72.

–  Release retainers -arrows- at cover for sealing flange. –  Release carefully electrical connection -arrow- on sealing flange and take off. –  Switch ignition on. The fuel pump should be heard to come on. –  Switch off ignition.

If the fuel pump does not start: –  Release carefully electrical connection -arrow- on sealing flange and take off.

–  Connect the remote control -V.A.G 1348/3 A- with adapter cable -V.A.G 1348/3-3- to contact -1- with an cable from the auxiliary measurement set -V.A.G 1594C-. –  Cover the second contact of the adapter wire -V.A.G 1348/3-3- with insulating tape -arrow- to avoid shorts. –  Join contact -5- to the bodywork earth using a cable from the auxiliary measurement set -V.A.G 1594C-. –  Connect the clip to the battery positive terminal („+“). –  Press remote control switch. l  Pump should start running audibly.   Note The fuel pump is very quiet. When testing the fuel pump ensure surrounds are quiet.

If you do not hear the pump functioning: –  Remove fuel delivery unit → Chapter. –  Check that the electrical wires between the flange and the fuel pump are coupled and that current circulates. If the wires are OK, the fuel pump is faulty. Therefore the fuel delivery unit should be replaced. –  Install fuel delivery unit → Chapter. Checking current consumption of fuel pump –  Extract the terminal connector from the fuel delivery unit flange

–  Adjust the multimeter to the 20 A range and connect it in series between the contacts -1- of the connector and the fuel pump using the auxiliary cables of the auxiliary measurement set -V.A.G 1594 C-.   Note The current clip of the multimeter -V.A.G 1715- may also be connected to an auxiliary cable between the contacts -1- of the connector and the fuel pump. –  Join the contacts -5- of the connector and the fuel pump using an auxiliary cable from the auxiliary measurement set -V.A.G 1594 C-. –  Start engine and run at idling speed. –  Measure the power consumption of the fuel pump. Specification: 3.5 to 4.5 amps. –  If the measured value is not within specifications: –  Renew fuel delivery unit → Chapter.